Ryobi Chainsaw PCP 4040 16" will not start after mistakenly
mixing chainsaw oil in petrol 50-1,ran for 10 minutes,then
seized up.freed it by adding a few drops of penetrating
oil into plug hole,than knocking the pull-cord fly wheel
round with a piece of wood,gently,a couple of times,
which freed the piston.Refilled with correct mixture,but
now will not start.Tried every thing.
The piston and bore are scored due to lack of oil- therefore you have no compression to start the engine. The machine is scrap unless you want to buy a new piston and barrell at £100+